Retirement Plans International Pension Plan, Expected Benefit Payments (Details) - Foreign Plan [Member] $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of years annual benefit payments	10 years
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 57
Defined Benefit Plan, Expected Future Benefit Payment, Year Two	55
Defined Benefit Plan, Expected Future Benefit Payment, Year Three	59
Defined Benefit Plan, Expected Future Benefit Payment, Year Four	64
Defined Benefit Plan, Expected Future Benefit Payment, Year Five	66
Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter	$ 386